API_Catalog_E_09_2011
128Pages

LESER UK Bristol, United Kingdom sales@leser.co.uk André Ramseyer AG Flamatt, Switzerland info@ramseyer.ch API LESER worldwide Hong Kong LESER Shenzen, China sales@leserchina.com API Flanged Safety Relief Valves Series 526 LESER Polska Poznan, Poland leser@leser.pl LESER S.A.R.L. Toulouse, France contact@leser.fr LESER LLC Charlotte (NC), USA salesus@leser.com PROTEGO-LESER do BRASIL Rio de Janeiro, Brazil protegoleser@protegoleser.com.br LESER representative LESER LLP Singapore sales@leser.com.sg LESER Office Middle East Bahrain gopal.n@leser.com FAINGER LESER Valves Mumbai, India info@fainger.com LESER stock and local assembly CATALOG API Catalog Edition September 2011/ 4.000 0777.5489 The-Safety-Valve.com LESER GmbH & Co. KG 20537 Hamburg, Wendenstr. 133-135 20506 Hamburg, P.O. Box 26 16 51 Fon +49 (40) 251 65-100 Fax +49 (40) 251 65-500 E-Mail: sales@leser.com www.leser.com The-Safety-Valve.com E

Product Range LESER Safety Valves for every industrial application API High Performance Series 526 Type 526 Compact Performance High Efficiency Clean Service H 2 SO 4 HNO 3 NH 3 HCL Critical Service Modulate Action Best Availability

Chapter/Page Chapter/Page General 00/01 Type 526 Applications, General design features 00/02 Flange facings 01/76 Valve finder 00/03 Spare parts 01/77 Available options 01/86 Approvals Type 526 General Contents 01/87 How to use: Signs and symbols, Flange drillings and facings 00/05 How to use: Selection charts 00/06 How to use: Capacity sheets 00/07 LEOS/G 00/09 LEOL 00/10 Sour gas service 00/11 Type 526 01/01 Capacities • Steam • Air • Water 01/06 01/08 Dimensions • Metric Units • US Units 01/10 01/12 Weights • Metric Units • US Units 01/14 01/15 Orifice D – T • Selection chart • Article...

General General Information LESER – API Safety Valves The API product group represents 3 Full range of spring loaded safety valves acc. to API 526 3 State-of-the-art design from the safety valve specialist 3 Competitive solutions for the API market LESER´s API safety valves • Are designed to meet all applications which require API. • pen rapidly with an overpressure of max. 10 % to the full O design lift. • Have a maximum blowdown of 7 % for steam/gas service and 20% for liquid service. • Are developed in a close cooperation with plant engineers and service specialists. • Serve for...

General General Information Applications General Design Features LESER – API Safety Valves LESER´s API Safety Valves offer ultimate protection against overpressures in all applications for steam, gases and liquids. cover a large variety of types, materials and options to fit any application: LESER´s API Series 526 Safety valves present the simple safe solution for heavy duty applications, such as crude oil extraction, transportation and processing in • esign D • Refineries • Chemical industry • Petrochemical industry • Oil and gas – Onshore and Offshore • Vessels and piping systems •...

How to find the right Product Group Yes High Efficiency Yes Clean Service Yes Critical Service Medium­ controlled High operating to set pressure ratio, high backpressure or low total height? No Clean Service application? No Critical Service / highly corrosive application? Yes API No Steam, gas and liquid application with low capacity in relation to valve size? Yes Modulate Action Spring loaded API specified application? Safety Valves No No Orifice ≥ F High Performance Required Orifice letter? Additional components beyond safety valves 00/03 Yes Best Availability Bursting­ disc Orifice ≤ F...

General Valve finder How to find the right API Safety Valve Step 6 5 Procedere Reference LESER Type 526 Determination of the code for lifting device Cap H2 Plain lever H3 Packed lever H4 Plain lever H3 Open bonnet Code for lifting device Lifting device H2 H3 H4 closed closed closed Bonnet H3 open WCB 1.0619, WC6 1.7357, LCB 3 4 5 2 – 4 – Selection chart Type 526 Determination of: 150 x 150 5262.001X – WCB WC6 0 Specification table Orifice D D 300L x 150 25 300 x 150 5262.002X 5267.006X 50 75 600 x 150 5262.003X 5267.007X p [bar] 100 Article numbers, dimensions and weights 900 x 300 150 1500...

General How to use General signs and symbols 3 This option is covered by standard design Available – Not possible * Signs and symbols for flange drillings and flange facings * Standard design, no option code required (*) Flange dimensions except flange thickness are in accordance with flange standard (e.g. ASME B16.5) Flange thickness is smaller (max. 2 mm), see “Multiple pressure rating” – Flange drilling/facing is not possible Option code for flange drilling and dimension, e.g. H50 H50 Flange drilling as specified in flange standard Outer flange diameter, flange thickness and height of...

Selection charts The pages 01/16 - 01/71 contain selection charts and specification tables. They specify important data about the valves based on the API 526 fifth edition 2002 like • Valve size • Set pressure and temperature limits • Body materials • Back pressure limits • Flange rating classes Step Procedure Reference Type 526 Orifice D° LESER Selection chart

General How to use Sample Capacity sheet – How to select capacities for steam: Type 526, Valve size 1 F 2 Type 526 Capacities – Steam Capacities for saturated steam according to AD 2000-Merkblatt A2, based on set pressure plus 10 % overpressure. 8 Capacities at 1 bar (14.5 psig) and below are based on 0.1 bar (1.45 psig) overpressure. Capacities for saturated steam according to ASME Section VIII (UV), based on set pressure plus 10% overpressure. Capacities at 2.07 bar (30 psig) and below are based on 0.207 bar (3 psig) overpressure. 1 Metric Units US Units AD 2000-Merkblatt A2 [kg/h] 2 G...

General How to use 8 Base of calculation Metric Units Capacity calculation according to AD 2000-Merkblatt A2 Code US Units Capacity calculation according to ASME Section VIII (UV) Media STEAM (saturated steam) Standard conditions Steam table IAPWS-IF97 IAPWS Industrial Formulation for the Thermodynamic Properties of Water and Steam [kg/h] Steam table IAPWS-IF97 IAPWS Industrial Formulation for the Thermodynamic Properties of Water and Steam [lb/h] AIR Standard conditions 0 °C and 1013 mbar [mn3/h] 16 °C (60 °F) [S.C.F.M.] WATER Standard conditions 20 °C (68 °F) [103 kg/h] 21 °C (70 °F)...